The contact owns a 2016 Tesla Model S. The contact stated while attempting to park the vehicle, the brake pedal was depressed and failed to respond. There were no warning lights illuminated. The contact depressed the brake and the vehicle kept rolling forward. The contact opened the door for the vehicle to come to a stop. On another occasion, the contact stated that the ADAS feature engaged and while driving at various speeds, and the vehicle failed to recognize stop signs, traffic lights, or pedestrians. The contact stated that the function was a paid feature; however, the system failed to operate as designed. On another occasion, the contact stated that the steering will shift to one side while driving at various speeds, and the vehicle became difficult to steer. The vehicle was not taken to the dealer to be diagnosed or repaired. The dealer was made aware, and the contact had a pending appointment scheduled. The manufacturer was not made aware of the failure. The failure mileage was approximately 79,000.